72320623 has 2 divisors, whose sum is σ = 72320624. Its totient is φ = 72320622.

The previous prime is 72320621. The next prime is 72320627. The reversal of 72320623 is 32602327.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72320623 - 2¹ = 72320621 is a prime.

It is a super-2 number, since 2×72320623² = 10460545022216258, which contains 22 as substring.

Together with 72320621, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72320621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36160311 + 36160312.

It is an arithmetic number, because the mean of its divisors is an integer number (36160312).

Almost surely, 2^72320623 is an apocalyptic number.

72320623 is a deficient number, since it is larger than the sum of its proper divisors (1).

72320623 is an equidigital number, since it uses as much as digits as its factorization.

72320623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 72320623 is about 8504.1532794276. The cubic root of 72320623 is about 416.6333712772.

The spelling of 72320623 in words is "seventy-two million, three hundred twenty thousand, six hundred twenty-three".